in reply to NTLM authentication fails with WWW:Mechanize, fine with LWP::UserAgent

I'm still banging my head on this one. I've tried using LWP to generate a valid authentication string, and passing that in the headers of a mech request, but that's not working either, presumably because I'm being issued another challenge.

Any pointers would be much appreciated.

my name's not Keith, and I'm not reasonable.